Can opener



FIG. 1 is a front elevation of a can opener showing my new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is an elevation of the opposite side illustrated in FIG. 2;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view of the can opener in an alternate open position. 

The ornamental design for a can opener, as shown. 